1988 65438+ 10, Song He, chairman of Hengtai Dyeing Industry, and Judu, a dyeing expert, worked in the technical department of Tonghua Knitting and Printing Factory. Because the export business is color samples provided by foreign businessmen, the color requirements are very accurate, and each sample has to be tested dozens or even hundreds of times. Sometimes, the dyed fabric is sent back to the factory for re-dyeing. Dyeing is much more difficult than dyeing. In this technical environment, Song Heju developed the first-hand fabric color-changing technology, which laid the technical foundation for inventing the color-changing principle of "big color wheel".

2. The founder of the state-owned enterprise Hengtai resigned and set up his own factory.

1In April, 1989, Song, then the technical director of knitting printing and dyeing factory, was hired as the director of social welfare printing and dyeing factory in Dongchang District, Tonghua City, and became the founder of Hengtai Dyeing Industry after fierce and strict examination. Ju Cong, then a full-time technician in the technical department of Tonghua Knitting Factory No.2, resigned from his work unit and became an early professional and technical talent of the factory, becoming the technical founder of Hengtai Dyeing Industry.

3. Solve the dyeing test of colored clothing from the waste collection station.

In June, 1989, Ju took two engineers to expand the range of color change. But at that time, there was a lack of colored clothes for testing, and it was impossible to buy new ones for such destructive testing without funds. In desperation, they found the Red Cross Society of Tonghua City, which provided some colorful clothes and entrusted the waste collection station to buy some.

4. It's the first time to change the old tricolor dyed clothes with the formula.

From June 65438 to September 0989, the scientific research team led by Song Heju used the color matching formula for the first time to carry out dyeing business. From then on, the dyed clothes are no longer a single third of the color, but the range of color change is very narrow, only dozens, such as red turning black, yellow turning red, pink turning red, yellow turning green, orange turning red and so on. The accuracy of color change is only 30%, but the customer was also very satisfied at that time.

5. R&D of plum blossom red paper series occupied the market for two years.

During this period, handwritten Spring Festival couplets were all made of 40 grams of red paper. This kind of paper is coated with acid red G on glossy paper, which is dull, dull and seriously discolored. Later, Tianjin Third Color Paper Factory invented a kind of plum red paper with suede and plum red light, which became a compact red paper at that time. I can't buy it locally at all, so I have to go to Tianjin to buy it. At that time, in addition to dyeing cotton and linen clothes, the factory gained a good reputation because it could solve some cutting-edge jobs that could not be dyed elsewhere, so a paper seller found them and said that if plum red paper was developed, how much would it be underwritten? Song made a special trip to Tianjin for this purpose. Adults are not allowed to enter the factory. Later, he met a dyer, invited him to dinner, and learned that this process is to brush by hand, light color, dry and then brush for the second time. The dyer also brought him a piece of lining paper. After Song took it home, he and Ju studied it again and again. Since there was no instrument at that time, I had to lick it with my tongue to see if it was acidic or alkaline. Unfortunately, my tongue tastes red, but I still can't tell what it is. Later, the lining paper was scraped with a hard object to produce white powder. The experiment found that it was aluminum sulfate, a special industrial primer. Therefore, the production of plum red paper was developed. Plum red paper was dyed with acid dyes in four series of 32 colors: rose red, emerald green, golden yellow and rose powder. One day, 5000 pieces of plum red paper are produced, which are distributed by the secondary wholesale station of Meihekou, and the sales network reaches Shandong, Hebei and other places. I have been working for more than two years.

6. Successfully developed the popular red series.

At the end of 65438+July 0989- 1990, the red series was popular in the society. In order to meet the market demand, the factory devoted most of its energy to red series dyeing and discoloration, and finally developed more than 2,000 kinds of discoloration formulas for colored old clothes. Among them, 40 or 50 kinds can be used accurately, and the other dyeing deviations are large and uncontrollable. During this period, colored old clothes were dyed and replaced with rose series, rosewood series, coffee series, rust red series, flag red series, brick red series and crimson series, which was particularly successful. In addition, you can also change light colors, such as gouache, flesh color, light red, scarlet, beige and other series. For example, in June+10, 5438, a female client engaged in foreign trade art design brought a white knitted sweater coat and asked to dye it in her own light crimson, and said that she could pay more, but she could only dye it for herself. To this end, the factory samples, samples, and finally samples. It took more than half a day to finally satisfy the picky female customers.

7. Solve the problem of opaque white core in strands by alkali shrinkage method.

In June, 1990, 1 1, the factory received a dyeing order from Daquanyuan Company, requesting three tons of pure cotton stocks to be dyed bright green. Northeast ginseng exported to Britain was tied with strands and packed in exquisite packaging boxes. The color of colored lines in the market can not meet the requirements, and the color fading is serious, which will pollute the red ginseng. The company found three professional printing and dyeing factories, all of which were afraid to work because of fading. Finally, we found our factory through Tonghua County Silk Printing and Dyeing Factory. After more than a month of repeated proofing research and experiments, the light samples were sent back and forth for more than 40 times, four dyes were changed, and various additives were tried. A dye with very good color fastness was used, but an opaque white core was left in the strand. Later, after repeated research, the problem was solved by alkali condensation. Finally, the dyeing task of 3 tons of special export bright green binding line was completed. Its brightness and color fastness have passed the acceptance of Tonghua Import and Export Inspection Bureau.

8. Find out the dyeing process of this kind of clothes from the dyeing of metallic sequins.

Just in winter, a middle-aged woman brought a malachite green woolen sweater worsted coat. The factory department dyed according to the routine dyeing procedure of 98 degrees at that time. I was satisfied with the color when I handed in my work, but I was told that there were sequins and bright beads on my chest, and they were all gone. The reception department said it was not found! Arguing with each other. Later, the technicians found that there were many hard spots on the coat, which were rubbed by hand, softened, scraped and turned white, indicating that it was left by colloidal objects. After careful study, it turned out to be a high-temperature water-soluble plastic. Obviously, the viscose of the metallic sequins and bright beads melted at high temperature, and the sequins and bright beads fell into the dye solution and were lost. I can't help it People are rich with 200 yuan. Since then, clothes with sequins have been removed in advance, dyed and then glued on.

Another time, I received a sequined dress from a customer, which was sewn with thread instead of glue. I feel very happy, and I don't have to open it, which saves trouble. I don't think so. The dyed sequins are dull. After research, the metal logo is acidified, so it is found that this kind of clothes, including jeans with various metal logos, are not dyed with acid, but with double dyeing.

9. Find out the identification method of artificial leather and genuine leather from the garment mosaic dyeing deformation.

A customer brought a mobile wool cardigan with a piece of dark green leather at the elbow and shoulder. Life counters are hard to touch by hand, which is also considered as artificial leather and easy to dye, because artificial leather is not easy to deform and change color when dyed. After dyeing, it was found that it was wrong. All the leather parts were shrunk and deformed, and it was found to be sheepskin, because it was inferior. In order to avoid losses, the factory found a leather shoes factory. When asked, it's all cowhide. It's too hard. After the introduction of the factory, I went to a fur coat factory, the color was wrong. It was dark. Discuss with customers that black is not good and mosaic is not good. Finally, the original price compensation is more than 200 yuan. Therefore, it is not reliable to identify leather only by hand feeling, and a scientific method must be found. They removed the veneer, cut it into thin strips, lit it, smelled of singeing, and it went out without fire. Take another piece of artificial leather, it will smoke when lit, and it will become more and more prosperous, and the oil drops will be pungent.

10, the process of adding stiffening agent is developed through the deformation of dyed felt hat.

An old man traveled to Inner Mongolia and bought a brown felt hat. I feel too bright when I come back and want to dye it black. After high temperature dyeing, the color is very black, but the hat becomes black felt, and the stiff hat becomes soft and shapeless. Lose money, 85 yuan. Through research, the original hat is pressed by hot setting with a mold, thus mastering the process of adding fresh-keeping boxes when dyeing this kind of clothes.

1 1, soak at room temperature to solve the serious deformation problem of dyed objects.

1990 65438+In February, General Manager Zhang Fengqi of Tonghua Arts and Crafts Import and Export Corporation organized the export of wicker baskets. Toudao Town, Ji 'an City organized the production, and housewives made use of the local rich wicker to weave baskets and flower arranging utensils. At first, their products were not colored by themselves, but packed and transported to the south for coloring, which was costly and thin. Later, Mr. Zhang found the factory and asked for coloring. The first time was a pot-shaped jar filled with sundries, twisted with the skin of corn cob and dyed brown. At first, it was dyed at high temperature, and soon it was colored, but high temperature caused serious deformation of corn husks, and some even bulged. Later, it was soaked at room temperature for 48 hours, and the color was very bright and did not fade. Later, he dyed his own bamboo products and wicker products one after another, and his reputation was good.

12, the loss of Korean jacket dyeing found that the fluorescent lamp had extinction effect.

199 1 On the morning of the twelfth lunar month, a couple brought a woman's Korean turquoise coat, which faded badly. There was no sample card at that time, but the sales department had a calendar. The client found a bright blue color in the painting and told him to dye it like this. He also said that he would put it on tonight so that he could go home for the New Year, and he was willing to pay the urgent fee. After research, it is a woven nylon thin fabric. According to the simple process, the material is cut with bright blue formula. I dyed it in the afternoon, and the color is quite bright. Song Heju, who is in charge of technology, is quite proud and has a sense of accomplishment. At 7 o'clock in the evening, the couple took clothes. It looked good at first, and the man was very satisfied. But the woman studied it carefully, compared it with the bright blue calendar, and saidno. The technician looked at it and wondered: it was bright during the day, but it changed at night. Bright blue in the calendar, bright and shiny; What about dyed clothes? They are dark and bright, with great contrast. What the customer says is not done, it is dyed. First, it delays the New Year and affects the good mood; Second, it is imported from South Korea, and the fabric is high-grade and expensive, so it can't be worn any more! Tangled, and finally lost more than 400 yuan! This sudden change, the amount of compensation is the monthly salary of two people, and it is New Year's Eve. Ju Shuyan and Song Zikai are particularly depressed. At this time, disputes and the past of losing money welled up in my heart, and I couldn't control my feelings any more, so I couldn't help crying. What's going on here? It was fine during the day, but how did it change at night? This business is impossible, and the technology of dyeing clothes is too difficult to control. I'd rather pick up garbage than do it! They immediately decided to wash their hands of it and change careers! Although the next day they found that Korean jackets were quite bright during the day, the bright blue on the calendar was not as good as last night. After research, it turned out to be made of fluorescent lamps. Sunlight has an extinction effect on colors, so it is dark during the day and bright at night. Because of the ink on the calendar, it is more colorful because of its reflection in the light. Therefore, it can be seen that fluorescent lamps cannot be used in the retail sector. But last night's unfairness hurt them too much, so they decided to quit, even though it was not good. Besides, when they refused to accept the loan in the first month, they sold all the equipment and tools to show their determination to wash their hands of it. After the first month, they came to Liu Xi, Liaoning, and found several printing and dyeing factories to apply for printing and dyeing engineers.

Later, some acquaintances, old customers and employees of the second knitting factory brought clothes to dye. They tried their best to avoid it, saying that technology was really difficult to control, so they quit. Everyone has repeatedly advised and expressed support, saying that I can take this dress for training and not let me pay. Finally, people's repeated persuasion is also a strong call of market demand, and they have a strong belief in R&D achievements, which makes the technical backbone of Hengtai Dyeing and Chemical Industry change their minds and join in the clothing dyeing and chemical industry.

13, steam dyeing technology was invented to solve the problem of elegant dyeing.

1991February, Mr. Xu, the boss of Tonghua City, sent a fine knitted sweater with a flat knitting machine. The color requirements are elegant, very light. However, the whiteness and purity of wool produced by domestic raw wool are only half of that of imported raw wool, and all of them are dyed in ready-made clothes, with six colors, such as flesh color, light army green color and sorghum rice soup color. It is required that the pot difference should not exceed 2%, so it is difficult to meet the export requirements. To this end, they used their brains to design a double-row large dyeing vat for steam dyeing. Because of can dyeing, the color cannot be guaranteed to be light. The specific method is to dip dye first and then take it out immediately for steam dyeing. As a result, it took more than three months to complete the export task.

14. Develop five processes to meet the requirements of high cleanliness and whiteness of greasy tablecloths.

199 1 In March, Tonghua Yuhuangshan Hotel received a batch of urgent items. Because the meetings of the Municipal People's Congress and the Chinese People's Political Consultative Conference will be held in this hotel, the whiteness of the hotel's sheets, quilts and tablecloths can not meet the requirements, and it is not only too late to purchase new ones, but also too expensive. They went to Tonghua Shuidong Printing and Dyeing Factory to contact this business, but they were rejected, but they recommended Dongchang Welfare Factory for whitening. General manager Zhang personally ran to our factory and asked if he could dye the dirty and greasy tablecloth new. Seeing the great demand, the technicians carefully planned to dye two tablecloths in two hours with five processes: degreasing, alkali shrinkage, bleaching, bluing and whitening. Mr. Zhang was very excited and even cheered. Brought a car full of tablecloths and sheets, and the employees of the whole factory stayed up for four days and nights, completing the task as scheduled. After that, all the work of the hotel was contracted to the factory, and through Mr. Zhang, it was connected to the city hotel, the military supply station, the Dongshan Hotel, and even the hotels in Liuhe County, Hunjiang, Ji' an and Kuaidamao Town.

15. A low-temperature dyeing fixation method was developed.

199 1 in may, a military clothing factory in Tonghua produced multifunctional field backpacks for a country, which required high color fastness. Seeing the delivery date, the Foreign Trade Bureau suddenly found that the weight of the fabric was insufficient and the color did not meet the requirements. This is a violation of the contract, and the situation is extremely serious. It's too late to reproduce, and you will face huge compensation if you don't finish it. Director Zhao found Tonghua Printing and Dyeing Factory, but the factory didn't dare to pick it up and recommended our factory. Director Zhao came to our factory and asked to produce 40,000 fully qualified backpacks within 20 days. Thanks to the technical innovation of "Daquanyuan", there is no problem with the color and firmness, but it is found that there is a black numbered seal inside the bag, which cannot fade or change color. This is a difficult problem that has never been encountered before. Through experiments, it is found that the seal is glued with high magnification. After several tests, it was finally found that when the temperature exceeded 80 degrees, the ink obviously fell off; Below 80 degrees, the fastness is no problem, so they found a way to fix the color at low temperature.

16, dyeing metal and glass with animal glue.

1991June, Tonghua spring factory received a batch of export machine tool signs. The material is pure aluminum, with oxide layer on it, non-staining, special color requirements, light malachite green. The test before dyeing shows that this aluminum material has high density and poor air permeability. Wipe it off by hand after dyeing. After repeated research and experiments, in order to remove the oxide film, they first soaked aluminum in nitric acid for 48 hours, and then found an animal glue, which was both colored and transparent. First, it was coated on aluminum and then dyed, and the export task was completed.

In July, 199 1, Tonghua wanbang service company got foreign news that "the supply of colored glass is in short supply" and found our factory to change ordinary glass into colored glass through dyeing, such as olive, sapphire, brown and other colored glass. According to the dyeing method of aluminum, our factory dyed various colors of glass with animal glue and completed the task. Later, it was found that this method was not durable, but at that time Wanbang was already very satisfied.

17, I made a mistake when dyeing montague shirts, and then I realized that I couldn't use direct dyes.

199 1 In July, a business owner brought a dark green T-shirt, the back of which faded, saying that it was a famous brand imported from abroad. 120 yuan bought it and asked for a deeper primary color. When the technician touched it, it felt smooth and really high-grade. Considering that I haven't been exposed to this blouse, it's an expensive brand, and I'm afraid I'll lose money if I dye it, I don't want to take this job. The boss is very arrogant, saying that he can take it without paying. Seeing that the boss didn't look like a caring person, I accepted it. It was identified as nylon material. By making samples, the process design adopts direct green dye, and the dyeing effect is close to the primary color, fresh and shiny, just like new life. The boss was quite satisfied after reading it. Later, I felt something was wrong. I said that a small yellow flower on my chest was gone, all dark green. This is the symbol of Montague's famous brand, and it was this grade that was worn at that time. Without this symbol, it will become a fake brand and the grade will be gone. It hasn't faded from the original. At least you can see the famous brand! The technician who spoke had nothing to say. At that time, he agreed not to pay for it. He just asked us to take out some silk from the small yellow flowers. The boss agreed. After decoloration, it was found to be worsted cotton embroidery thread. Therefore, it is concluded that direct dyes must be avoided and montague shirts should be dyed with acid dyes. Also scrub clothes dyeing equipment and appliances to avoid polluting brand-name signs. Thus solving the dyeing process of charming shirts.

18, the shrinkage rate of dyed tweed pants was found to be cotton and wool blended tweed.

A retired secretary of the city cotton mill brought a pair of navy blue tweed trousers, which faded, saying that they were bought from Beijing, and the material was good. I was reluctant to throw them away and asked for deepening. After my factory took over, I dyed pure wool more than ten times, and the hair of the clothes was all zoom. Not only is it not dyed purple-blue, but it is also seriously shrunk. Have to lose money. Later, I began to study this dress. After disassembling the broken strands, it was found that there were some white yarns that could not be dyed by wool dyeing. Later I dyed it with pure cotton. Only then did I find out that this pair of tweed trousers is a wool-cotton blend. This shocked the technicians in the factory. Because there is no theory of cotton-wool blending since ancient times, or cotton-wool blending is not allowed at all However, in order to save costs, for the first time, manufacturers broke the routine and competed to use long-staple cotton instead of wool, which surprised professionals and made natural dyeing prone to accidents. For this reason, factory technicians understand that this practice of breaking the rules at will may become the new rules in the future. In other words, there will be random blending of clothes in the future, and there will be no rules and regulations, which may bring sharp and huge problems to the printing and dyeing industry, and the difficulty may be difficult for experts and professors in universities and research institutes to solve because they are not in contact with the printing and dyeing market. It seems that the heavy responsibility is likely to fall on these little people who are struggling in the market, and they must be prepared psychologically and technically.

19. Two-bath dyeing of blended fabric after dyeing.

A customer brought a rusty red tweed coat, which was badly faded and worn. Require the primary color to deepen. After accepting the previous lesson, it was quickly identified as a cotton-wool blend. In order to dye cotton and wool at the same time, the process design is to use direct dyes by weight. Therefore, serious color. The cuffs, pockets, neckline and buttons are badly worn, and other parts that are not seriously worn are lighter in color. Finally, lose money to customers. After research, blended fabrics can't be dyed in one bath. After many experiments, the cotton-wool blended fabric dyed by two-bath method was studied.

20. The depth after dyeing is uneven, so a one-bath slow dyeing process of cotton-wool blended fabric was developed.

Another customer brought a tweed coat, which was identified as a blend of cotton and wool. Drawing lessons from the last experience, two-bath dyeing method was adopted. Dye cotton first, and add salt to the auxiliary. After dyeing wool, the auxiliary agent is added with acid. As a result of dyeing, the cotton part was dyed by 60-70% and the wool part was dyed by 100%. As a result, one piece is darker than the other, and the dyeing is uneven. Therefore, wool and cotton dyed unevenly after adding acid. Therefore, a one-bath slow dyeing process of cotton-wool blended wool fabric was developed, and the dye ratio was adjusted without adding additives. This technology continues to this day.

2 1, the research on wool dyeing was done, and the package dyeing was changed to frame dyeing.

A female customer near the factory brought a set of worn-out navy blue wool to be dyed deeper. Dyed many times in the factory, it is still the same color, and it also produces terry. In desperation, I bought the same color wool from the department store to compensate others. Later, it was found that it was right to add acid to wool, but it was too much, so the color was different. Therefore, the process of adding acid at low temperature and adding acid at high temperature is studied, which is divided into two steps. Terry came out because the wool was dyed in the bag, and the bent part of the wool was not stretched by external force, so it did not completely recover its original straight state after high temperature setting. After the design is completed, the wool is wound on the bamboo frame and dyed successfully.

22. The low-temperature dyeing method is summarized from the loss of elasticity of the threaded cuffs of the dyed coat.

A young couple brought a jacket-style jacket with elastic and tight lines at the hem and cuffs. They asked for a change from gray to crimson. After dyeing in our factory, the color of the clothes is still ideal, but the lines on the cuffs and hem are very thin, loose and inelastic, and the appearance has lost its fluffy feeling. The young couple said they would quit, but they refused to accept it through negotiation. They threw away their clothes and left. The next day, the competitor smashed a big hole in the factory number.

It is found that the cuffs and hem are acrylic knitted ribs, and high temperature dyeing will seriously deform the fabric structure. After many experiments, it is concluded that the dyeing temperature of acrylic fiber should not be higher than 70 degrees, and rebound finishing should be adopted after dyeing.

23, find the residual activated carbon in asphalt heavy pollution, remove stains.

1991April, after the advertisement of dyeing clothes was published in City Times, the number of dyeing clothes customers increased sharply. Especially Changchun and Jilin. Ms. Liu, a trade union cadre of Jihua Group, called after seeing the advertisement, saying that there are thousands of pieces of tooling, can it be decontaminated and returned? When the factory leaders inquired, they felt that transportation was a big problem, and they didn't make money after accounting. Ms. Liu said that if you can open a dyeing shop in Jilin, we can send it to you by car. Factory leaders were tempted, because they found that there were more hotels and guest houses in Jilin than in Tonghua, with a rough count of 200. So on September 30th, the factory rented a workshop in Hadawan Street Knitting Factory in Jilin City and began to dye tooling for Jihua Group. Among them, there is a problem in the work clothes of petrochemical branch: all of them are polluted by industrial heavy oil asphalt, so that even the factory logo can't be seen clearly. The difficulty lies in that it not only contains grease, but also contains activated carbon, which has strong adsorption and adheres to the fibers of work clothes. According to past experience, the first step is to remove heavy oil by alkali condensation, and then the oil will float to a thick layer. After the grease is removed, there are still pieces of carbon black in the tooling, and I can't get rid of it. I've never encountered such a stain before. I checked the chemistry manual and found that the method of stripping activated carbon from clothing fiber is to add activator and cellulose solvent, but I didn't elaborate on the procedure and time. When the technicians in the factory began to soak with surfactant, the time was wrong and the effect was not ideal. After repeated experiments, it was found that soaking for two hours made the fiber swell and soften, and the internal dirt dissolved. It's just that charcoal hasn't been removed yet. Add fiber solvent, soak for an hour or two, and it will not be clean after five hours. Later, I will soak in warm water all day, and the water will turn black. According to the data, chelating agent must be added quickly to make carbon become macromolecular colloid precipitation, otherwise it will be adsorbed on the fiber again. After the carbon black falls off, brush it with a brush to restore the original egg blue color of the tooling, and finally achieve the satisfaction of the oil plant.

24. Eliminate the smoky yellow and white gauze wedding dress by stripping at room temperature.

199 1 65438+February, a wedding dress clothing store caught fire, and hundreds of white gauze wedding dresses were heavily smoked down by smoke. The boss brought several particularly serious samples, demanding that the best ones can be restored to pure white, and the ones that can't be dyed into big red will do.

At first, I thought it was simple. First of all, I bleached it with hydrogen peroxide, and the yellow color didn't change at all. After that, the yellow color was removed with liquid chlorine. When the temperature reaches 98 degrees, the fiber is boiled away and no yellow color is removed. Later, fluorescent whitening agent was used to neutralize the macula, which had no effect. After research, it is known that smoked yellow does not seem to adhere to the surface of gauze, but must have entered the fiber. Smoke should be adsorbed by activated carbon on wedding fibers. According to experience, activated carbon must be stripped with fiber solvent. Jilin Oil Factory is work clothes, which can be heated, but the wedding dress is so thin that it can't be heated at all, so it can only be peeled at room temperature. How long will it take to soak without hurting a very delicate wedding dress? One hour, three hours, one day, one night, another day, one night, done! Although a little thinner, it is flawless and beautiful. This technology is also used to deal with tobacco stains.

25. The down jacket was dyed too deeply, and it was found that the filler had no color.

199 1 year1kloc-0/month, it's the first time to dye sky blue down jacket for customers. The fabric is nylon fiber. In the process design, it is considered that both nylon fabric and duck down fiber should be dyed. There was no experience at that time, and the material was cut according to the total weight of clothes including duck down. As a result, the color was more than ten times darker and turned black. Moreover, when dyeing and heating, the duck down suit bulges like a human, and the dyeing vat can't hold it, so the two of them hold it tightly. Finally, the customer was dissatisfied and lost more than 200 yuan. After research, it is found that the duck down inside is not stained at all, and the original stuffing is generally not stained. When dyeing, it can be cut according to the weight of the fabric. The cause of bulging is also very clear, and it can be solved by opening a few air holes in the lining.

26. I failed to dye polyester clothing for the first time, and I realized that the advent of polyester was a major challenge to the printing and dyeing industry.

199 1 year1kloc-0/month, a post office worker brought an olive green polyester knitting suit to change it into black. I didn't dye it at that time. After adding several mordants, I didn't get pure black all afternoon, especially it shrank by more than 30%, and I couldn't wear it at all. No way, Giant lost the brand-new polyester fabric distributed by No.2 Knitting Factory to others. At that time, I realized that it was too difficult to dye polyester at room temperature and pressure. The advent of polyester is undoubtedly a big challenge to the dyeing industry, and we must meet this challenge with continuous exploration!

27, dyed deerskin clothing lost a lot of money to find the soft technology of anti-velvet and anti-retraction.

199 1 year1kloc-0/month, a boss brought back a deerskin suede dark green jacket from Russia, which faded and turned white. Because it feels soft, like velvet, the consignee didn't identify it as deerskin, so it was taken as velvet. Workshop dyeing is also mass dyeing and high temperature dyeing. After dyeing, the color is fresh and bright as new, but it has shrunk so badly that children can't wear it, and it is still hard after drying. The boss was angry and said that he spent more than 3000 yuan on it. The result was a loss of 1200 yuan. Later, it was found to be deerskin, from which we know that suede can be dyed with water. Because fur used to be pink, I never dared to dye it with water. But how to solve the problem of shrinkage has not yet found the answer.

Then a customer brought a brown pigskin suede suit, which was badly faded and needed to be renovated. After accepting the last lesson, the counter staff told the customer that there was no charge, but once it shrunk, don't let it go. The client agreed. Start doing experiments. For the first time, I dyed it with 40 degrees warm water for an hour, but it was not saturated. The second time it was dyed at 70 degrees for 40 minutes, it was found that the color was saturated, but the leather was soft, so it stopped quickly. After dehydration, it was found that the lining of the leather grew by one inch until the surface of the leather shrank. Then the temperature dropped to 55 degrees. Two hours later, the dyer put his finger into the dye vat and said, my hands can stand it, and so can the leather. Keep talking about 60 degrees, no problem, it will shorten the time to one hour. The color darkened, but the leather hardened. Ask the stone engineer of Jilin Leather Shoes Factory. He introduced a leather fatliquoring agent and brought some. After use, the hardness has been improved, but it has not reached the wearable softness. Later, I found a leather proving ground in Changchun and asked the engineer Ge Qingshan. Told me to add softener to soften the back of the hair after it was turned over, and taught me the dyeing technology of the back of the hair. After coming back, the problem of leather hardening after dyeing was solved, and this technology is still in use today.